Damper



l (NoMddeL) P. G. DAVIS.

v DAMPER. No. 287,637. v Patented Oct. 30, 1883 WITNESSES: INVENTOR:

y BY ATTORNEYS.

N4 PETERS. PMw-Ijlhognphen Washinglom D. c.

UNITED! STATES PATENT- OFFICE.

l FREDRIO G. DAVIS, OF AUBURN, INDIANA.

-' DA PER.

SPECIFICATION forming part of Iietters Patent No. 287,637, dated October 30,1883.

' 7 Application filed June 16, 1883. (No model.). a

To all whom it may concern Be it knownv that I, FREDRIO O. DAVIS, of

responding parts in both the figures.

Figure 1 is a perspective view of my new and improved damper; and Fig. 2 is a sectional plan View, showing the damper in place in a stove pipe or drum.

Theinyention will first be described in con nection with the drawings, and then pointed out in the claims. Y

The main frame of the damper is composed of the plates at I). These are by preference made of cast-iron, and are cast separately and bolted together at right angles to each other, the plate I) being arranged along the longitudinal center of the plate a, so that when the damper is in place in the stove pipe or drum A the frame (plates ab) will divide theinside space of the pipe or drum into three equal or nearly equal vertical passages.

a is the upper and d is the lower damperplate. These are also, by preference, made or cast-iron. The upper plate, 0, is semicircular (or nearly so) in form, and is secured centrally upon the operating-rod e, which passes through the stove pipe or drum, as shown in Fig. 2, while theplate d is segmentalin form, (constituting nearly three-quarters of a circular disk,) and is hinged to the lower edge of the plate I), as shown in Fig. 2, and the plates 0 d are connected together by the hinged rod or plate f, so that both may be operated simultaneously for opening I and closing the draft bythe one rod 6, and so that they will always maintain the same relative position to each other. When open, the plates 0 d will stand in vertical position, as shown in dotted lines in Fig. 1. Whenclosed, they will be turned to horizontal position across the pipe or drum, as and 2. I

The plate Z) is notched or cut away at its upper end to form the passage b, and the plate a is notched or cut away at its lower end to form the passage a, and this latter passage is adapted to be closed more or less by the sliding plate g, for regulating the current or draft shown. in full lines in Figs. 1 sage, a, in combinationwiththe damper-plates b, then down and out through the lower passage, a, as illustrated by the arrows; and the plates 0 (1, acting as deflectors to this parted draft or current, cause it to take this circuitous and retarded route of about three times the ordinary distance, and cause it also at each turn to come against the inner wall siderable economy in heat.

To prevent all danger of turning the damper-plates too far imclosing the damper, I form upon the, upper edge of the plate a the stop a, for the plate 0 to act against; or I form the leg I) at the" lower end of the plate a, as shown in Fig. 1, for the plate d to act against. I do not abandon or dedicate to the public any patentable features set forth herein and not hereinafter claimed, but reserve the right to claim the same, either in a reissue of any patent that may be granted upon this application or in other applications for Letters Patent that I may make. p j

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a damper, the plates a b, that divide the pipe or drum into three vertical passages, substantially as described. I

2. In a'damper, the combination, withthe plates at b, of the damper-plates c d, arranged that may pass through the damper when the or surface of the pipe .or drum, effecting conto cut off the passages formed in the pipe 5 by the plates at b, substantially as described.

7 3. The plates a I), cut away to form the passages a b, in combination with the damperplates 2; cl, substantially as described.

4. The damper herein described, consisting of the plates to b, arranged to dividethe pipe or drum into three passages, and cut away to form upper passage, 11, andlower pasc d, arranged to reduce and deflect the draft when closed, substantially as described. FREDRIG O. DAVIS.

Witnesses: L

CHARLES EMANUEL, v HENRY A. LEsH.

ICC 

